Pump or compressor



Jul 28, 1970 E. KRZYSZCZUK PUMP 0R COMPRESSOR Filed Aug. 30, 1968 Sheets-Sheet m m m w.

3,521,981 PUMP R COMPRESSOR Edward Krzyszczuk, 2452 N. Spaulding Ave., Chicago, Ill. 60647 Filed Aug. 30, 1968, Ser. No. 756,632 Int. Cl. F04c 17/02; F16c 7/04; F014! 1/06 US. Cl. 418-63 9 Claims ABSTRACT OF THE DISCLOSURE A pump or compressor comprising a housing with inlet means and outlet means in communication therein, and an eccentrically disposed rotor in said chamber driven by a drive shaft with the rotor maintaining sealing contact with the wall of the cylinder housing in its movement over or around the same, and with blade means in the housing maintained in sealing contact with the surface of the rotor, and compressed air means for maintaining the blade means in sealing relationship with the rotor and with said compressed air means further providing air lubrication for the blade means.

The present invention relates to a pump or a compressor and more particularly to a rotary pump or compressor in which an eccentric rotates within a housing or cylinder.

It is an object of the present invention to provide a compressor having an eccentric rotator therein with blade means and a small portion of the compressed air flowing through slot means or passage means to provide air lubrication so as to permit the compressor to operate at speeds almost as high as turbo-compressors.

It is yet another object of the present invention to pro vide a compressor that is air lubricated by utilizing a portion of the compressed air to lubricate the blade means disposed within the housing.

It is yet another object of the present invention to provide a blade means for use in the housing of an eccentric rotor type compressor in which the blade means can slide freely upwardly and downwardly in a blade holder means.

It is yet another object of the present invention to provide a compressor having blade means therein which can move freely upwardly and downwardly between segment means and which further has air passage means therein for providing a lubricating means for the blade means.

Various other objects and advantages of the present invention will be more readily apparent from the following detailed description, when considered in connection with the accompanying drawings forming a part thereof, and in which:

FIG. 1 is a sectional view through a pump or compressor embodying the present invention;

FIG. 2 is a section taken along the lines 22 of FIG. 1;

FIG. 3 is a section taken along the lines 3-3 of FIG. 1;

FIG. 4 is fragmentary detailed view of the blade means shown in FIG. 1, except that it is disposed in a difierent position;

FIG. 5 is a sectional view of a pump or compressor with the blade means utilizing a biasing spring member, instead of the air pressure means illustrated in FIG. 4;

FIG. 6 is similar to the blade means shown in FIG. 5, but illustrating the blade holders being used as governing valves;

FIG. 7 is an embodiment of the invention illustrating a blade means with lobe means associated therewith; and

FIG. 8 is an enlarged detailed view of the embodiment of the invention shown in FIG. 7.

Referring to the drawings, the reference numeral 10 generally designates a housing or cylinder having end United States Patent 0 3,521,981 Patented July 28, 1970 walls 12 and 14 in which is disposed an eccentric rotor 16. The rotor is provided with ball bearings 18 disposed on a drive shaft 20 carried by bearings 22.

The housing, as best seen in FIG. 1, is provided with an air inlet or suction passage or connection 24, through which the material to be pumped or compressed may pass or be sucked in, in the operation of the air pump or the rotary air compressor. The suction passage 24 is in communication with the chamber 28 provided by the housing ing 10.

The housing 10 is further provided with a discharge or outlet passage or connection 30 in communication with the chamber 28. Intermediate the inlet 24 and the outlet 30, as best seen in FIG. 1, is a cylindrical recess or chamber 32 extending the length of the housing.

A T-shaped blade member 34 extends into the chamber 32. The blade 34 is provided with a plurality of substantially vertical drilled passages or slots 36 therethrough which communicate at their upper ends with the interior of the chamber 32. The upper or major portion of the blade 34 is substantially rectangular in cross-section, as best seen in FIG. 5, and its T section 38 adjacent its lower end is provided with horizontal drilled passages 40 therein and small connecting passages 42 which communicate with the rotor surface 44.

The blade 34 can move freely upwardly and downwardly into the chamber 32 and is disposed between a blade holder 46 as its slides upwardly and downwardly therebetween.

The chamber 32 communicates with the discharge 30 through a connecting passage 48.

When the rotor 16 moves in the direction of the arrow in FIG. 1, the upper portion of the T blade 34 moves or is pushed upwardly into the chamber 32 and decreases the volume or the space in this chamber and thus, the air within this chamber 32, which is supplied from the passage 48 and the discharge of the compressor, is compressed to a higher pressure. This highly compressed air will then flow through the connecting passages 36 and 40 and 42 between the surfaces of the moving parts of the rotor 16 and the blade to separate them. This will cause an air film to build up between the rotor surface and the T section of the blade to reduce the friction and to provide air lubrication between the parts.

The compressed air in the chamber 32 also flows through the passage 50 in communication with the chamber 32 and a recess 52 in the left side of the blade holder 46, so as to provide an air film between these moving parts.

In addition, the compressed air from the chamber 32 also passes through the connecting passage 54 in the blade holder 46 and into the passage 56 to provide air lubrication between the blade and the blade holder at this time.

At this time another passage 58, shown in dotted lines in FIG. 1, communicates the chamber 28 with the low pressure inlet or suction passage 24 to provide a high difference of pressures between the upper side 60 of the upper portion of the blade 34 and the side 62 of the blade.

As the drive shaft rotates farther, the rotor 16 will roll over and pass the blade holder 46, and the remaining compressed air in the chamber 32 will push or force the blade 34 downwardly so that it follows the rotor 16. At about the same time, the cutout portion 64, or this notched portion 64, opens the passage 48, as best seen in FIG. 4, and a new charge of compressed air is supplied to the interior of the chamber 32 from the compressor discharge.

Referring to the compressor illustrated in FIG. 5, there is shown therein a T blade 66 between a holder 68 with a biasing spring 70 for maintaining the blade in con- 3 tact with the rotor 16. This embodiment of the invention may be used for extra-high speed when the momentum force of the blade is larger than the pressure force acting on the blade. These spring-loaded blades could be lubricated with oil or other lubricant or the blades could be made of self-lubricating material.

Referring to the embodiment of the rotary compressor shown in FIG. 6, this shows the rotation of the compressor as indicated by the arrow therein and the arrows indicate the inlet and the exhaust lines to the interior of the housing chamber. In this embodiment of the invention the T-shaped blades 74 are also used as governing valves. When all ball bearings and the shaft are thermally insulated and cooled or heated, this compressor can operate at very high and very low temperatures.

Referring to the embodiment of the invention shown in FIGS. 7 and 8, this is substantially the same as that described in connection with the other embodiments of the invention, except that the chamber 80 between the inlet 82 and the outlet 84 is provided with a hollow sleeve type blade 86 and a biasing spring 88 is disposed in the chamber 80 and bears against the lower portion of the blade 86. Discharge or outlet 84 communicates with the interior of the chamber 80 by a passage 89.

The lower end of the blade 86 is provided with a semicircular cut-out portion forming a chamber 90 in communication with the chamber 80 through vertical passages 92 formed on opposites sides of a converging lobe 94.

Disposed within the chamber 90 is a blade shoe 96 having a concave recess 98 in its upper portion against which the lobe 94 seats. The lower end of the blade shoe 96 is provided with outwardly extending symmetrical sections or portions 100 having lubricating recesses or spaces 102 therein which face adjacent the outer surface of the rotor 16. The spaces 102 are in communication with the chamber 90 through drilled passages 104 therein.

A portion of the air that is passed through the passage 89 into the chamber 80 passes through a vertical passage 106 in the wall of the structure forming the chamber 80. The air passing through the passage 106 thereafter passes through small openings or passages 108 in the lower end of passage 106, which communicates with a concave recess 110 in the wall of the structure forming the chamber 80.

Another small portion of the air that is delivered through the passage 90, passes through another passage 110 in the other side of the structure forming the passage 80, and thereafter passes through small passages 112, which passages, are in the lower end of passage 110', and the air is thereafter passed into the concave space 114 on the other side of the blade 86 opposite the space 110 in the same structure.

The blade 86 moves up and down only and the blade shoe 96 which follows the rotor 16 is rocking. The rounded edge of the lobe 94 is rolling or rocking backward and forward in the concave recess 98 and the concave recess 98s bottom is right on the axis line of the upper portion of the blade shoe, as best seen in FIG. 8.

Grooves 116 and 118 are provided to collect the exhaust lubricating air. This exhaust air flows through passages 120 and 122, shown in dotted lines, to the intake side of the compressor.

Seals 124 made of self-lubricating material are provided to increase the difference of forces acting on each side of the blade 86.

Thus, from the foregoing description, it is apparent that the present invention provides a rotary compressor having a structure that acts like a valve operating structure, including segments which oscillate to feed and cut off the air to the pressure chamber above the wiper blade shank.

It is further apparent from the foregoing description that the present invention provides a novel and efficient means of providing air lubrication to the moving parts of the compressor so as to decrease substantially the friction and the wear of the parts.

Inasmuch as various changes may be made in the form and relative location of the parts, it is not meant to limit the scope of the invention except by the appended claims.

What is claimed is:

1. A rotary compressor including a cylinder, an eccentric rotor rotatably mounted in said cylinder, inlet and outlet means in communication with said cylinder, a

chamber formed in said cylinder, a blade mounted in said chamber and cooperating with the surface of said rotor, air passage means in said blade in communication with said chamber at one end and with said rotorsurface at the other end to supply lubricating air thereto, and discharge air passage means in communication with said outlet means and said chamber to supply fluid under pressure thereto, and a blade holder means in said chamber for holding said blade therein and said blade having an upper portion slidably disposed in said holder means, said holder means having passages communicatively connecting said chamber with opposite sides of the blade to supply lubricating air to the blade surfaces.

2. The compressor of claim 1 wherein said blade is of T configuration.

13-. The compressor of claim l1 wherein said holder means are segments on opposite sides of the blade with air passages therein adapted to communicate with said chamber and with the opposite sides of said blade to supply lubricating air to the blade surfaces to reduce friction.

4. The compressor of claim 3 wherein air return passages are provided in said segments was in communication with said inlet means to exhaust lubricating air to said inlet means.

5. The compressor of claim 1 wherein biasing spring means are provided normally urging said blade in a direction toward said rotor.

6. The compressor of claim 5 wherein said blade is a hollow sleeve, and has a blade shoe cooperating therewith.

7. The compressor of claim 6 wherein said blade has a chamber 'in its lower end, and said blade shoe is disposed therein and has a concave recess, and said blade has a lobe engaging said recess.

8. The compressor of claim 7 wherein said shoe has a circular portion seated in said blade chamber and diverging sections below said circular portion.

9. The compressor of claim 8 wherein air connecting passages extend through said portion and sections and communicate with said air passage means in said blade.

References Cited UNITED STATES PATENTS 600,671 3/1898 Gerard 91103 1,623,378 4/1927 Bavington 230- 1,796,535 3/1931 Rolalf 230149 2,050,473 8/1936 Steinmann 230-149 2,232,951 2/1941 Kosian 103-l23 2,873,683 2/1959 Sherwood 103123 2,969,020 l/1967 Fazekas 103123 FOREIGN PATENTS 1,104,871 6/ 1955 France.

301,441 10/1917 Germany.

845,793 8/1960 Great Britain. 1,033,454 6/1966 Great Britain.

668,434 3/1952 Great Britain.

tI-IENRY F. RADUAZO, Primary Examiner Us. (:1. X.R. 30s-.9 T: 

